It is known, that the voltage deviation from the
nominal value leads to a change in the technical
characteristics of the equipment and may cause a
violation of their working ability, including leading to
an emergency. The article deals with the known
structural diagram of single-phase voltage stabilizers
of AC power, the peculiarities of their work and their
disadvantages. To improve the performance
characteristics of single-phase AC voltage stabilizers,
we have proposed a functional scheme of the
stabilizers performed on transformers,
autotransformers and optosymistors. The article
considers features of the proposed circuit voltage
stabilizers. To stabilize three-phase voltage we have
proposed using a three-phase stabilizer. In this case, to
improve the reliability of the reserve there may be a
single-phase stabilizer, which automatically connects
to the appropriate phase at malfunction of one of the
working electronic voltage stabilizers. To stabilize
three-phase voltage, a stabilizer can be made based on
the three-phase transformer. In comparison with the
use of a single-phase stabilizer in a three-phase
system, the voltage stabilizer will have improved
weight and overall dimensions. To significantly
improve the technical characteristics of voltage
stabilizers, working in the autonomous power supply
systems, it is possible only through the use of modern
mathematical apparatus, allowing to simulate the
physical processes in power circuits of stabilizers in
nominal and emergency modes of operation
The aim of the research is analytical determination of
the middle speed of the corn seeds on the flat vibrating
sieve of finite width. The object of the study is the
process of sorting of seeds of corn on the flat vibrating
sieve. The mathematical modeling of the motion of the
separated layer of the cereal mixture on the sieve is
conditioned by the necessity of intensification of
division of grain-growing materials on a flat sieve.
Despite the significant progress in the development of
mathematical models of the motion of a mixture on
vibrated sieve, their further refinement remains an
actual task. In particular, in calculation practice, theory
in which the width of the flat sieve is considered
infinite is used, i.e. the impact on the process of the
moving frame of the sieve bed is not taken into
account. In connection with absence of estimations of
the error brought in by this assumption, the necessity
to develop a theory of the movement of the mixture on
a sieve of the finite width appeared. For the analysis,
the following assumptions were accepted: first, the
corn seeds were considered as balls of different
diameter, second – the layer of grain on a sieve was
considered as heterogeneous viscid liquid. Based on
undertaken study it is set that most rational for the
achievement of the put aim is application of method of
Bubnov-Galerkin. As a result of undertaken research
analytical dependences are received for the calculation
of flowrate of grain mixture on the vibrational sieve of
the final width taking into account separation of the
mixture into factions
Identification of the processes of knowledge manage-ment technical service companies was done. A general model of field subject was presented in the form of ontology. Software ontological modeling was re-viewed
This article describes the purpose of SmartHouse
systems, noting their advantages and disadvantages.
We have identified sustainable trends in the
implementation of such systems in the life of modern
people, and there has been a substantiation of the
need for their development. The article provides a
detailed description of a SmartHouse system and the
generalized structure of the system. Existing
approaches to management systems implementation
SmartHouse was consider. The subsystem of lighting
control was considered as an example. The structural
diagram of this subsystem was developed. We have
justified the choice of technical devices, hardware
and software subsystem of lighting control; we have
also given their description. As a subsystem device
we use Bluetooth module HC-05/06, four channel
relay module to connect to Arduino, Arduino Mega
2560 plate. We briefly describe the process of
programming the Arduino Mega plate. The necessity
of remote access subsystems was substantiated. We
have reviewed existing standards and technologies
for solving such problems and proposed the
implementation of remote access subsystem via a
mobile communication system using the Bluetooth
standard. The developed mobile application that
allows you to control devices on the example of the
lighting subsystem was described. We have
performed testing of the model of a subsystem of
lighting control and the developed software. The
proposal for the development of this work was given.
The further development of the subsystems of the
SmartHouse and realizing of remote access system
through the Internet were offered
In the article, the results of the analysis of the two-layer pole-switching winding, containing considerable amplitude of lower harmonics are shown. We have also investigated the effect of lower harmonics on the start of an induction motor
In this article we found out the usage reasonability of the solution of the Fokker-Planck equation for the problem of building of mathematical models of distributions of bounded random sequences
The temperature and the time of process of concentration were tested to receive a microbial safety apple pectin concentrate. The relation of yeast to apple pec-tin concentrate was studied
The article describes a condensation of geodetic networks by a point insert in a rigid figure on the basis of linear measurements. Ways of equalising of the received results are considered. The estimation of accuracy of definition of the defined point position is resulted.
The article considers scheme of sewage treatment
plants AG-STOK of Novorossiysk trading sea port,
designed to clean the surface runoff from the territory
of industrial sites and residential areas to the norms of
discharge in the drainage network. The installation
includes a well-separator, a storage tank, mechanical
cleaning of solids on a mechanical filter, filtration
through a filter with granular loading and filtration
through a filter with sorption loading. The treated
runoff, which corresponds to the conditions of
discharge into the urban drainage network,
accumulates in a tank of clean water and is diverted to
the storm sewer network. There are: the scheme of
treatment facilities, the explication of equipment, a
photo of a mechanical filter, a filter with a granular
load and a filter with a sorption load. The indicators of
surface runoff correspond to the norms of the
maximum permissible discharge
The tillage with moldboard plows is one of the energy-intensive operations in farming. In view of this, the search of the energy saving solutions and tillage aggregates receives priority. The use of rotary tillage tools based on the working body-mover with elliptic blades, which horizontal soil reaction parts are directed to favoring grade of the aggregate, and, therefore, apart from the performing engineering perform the body-mover functions, - is one of the effective ways of the energy cost reduction. The authors offer the development of the rotary cultivators based on the working body-mover with elliptic blades. The change of their design values allows the development of various profiles tools. The use of these working bodies based on rotary cultivators will allow the energy cost reduction by the tillage process, especially in the compartments of terrain, as the use of tractors with moldboard plows for the main tillage is problematic. In many cases, these lots must be labored manually. The article describes the construction, generalizes the mechanical specifications and working modes of the rotary cultivator at the main tillage